
Sun-spotting
We all miss the Sun at this time of year, don’t we? (Unless you’re reading this from Australia, I suppose.) Luckily for you, this blog post will help you find it! In previous posts we’ve learned how to make and calibrate a planetary equatorium, and how to use it to find the longitude of the planets and Moon. In my last equatorium post I mentioned latitude for the first time: unlike the planets, the Moon’s latitude matters because medieval astronomers were rather keen to be